Clients elevator fails to operate, displaying the C1 or C2 error code after any storm/power failure. Client previously removed/bypassed UPS. User guide suggests problem may be IGBT, but this can't be the case if simply removing power from unit for 30 hours seems to "fix" it each time this occurs. Without more technical information than the home owners user guide, I cannot help this client. Because this appears to be a reset problem, I did try resetting via the micro switches on the circuit board but this didn't fix the problem. Unit was installed in 2005. Any help would be appreciated.
